Re: 2.6.23-rc1-mm2

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To: Andrew Morton <akpm@...>
Cc: <linux-kernel@...>, <nfs@...>, Neil Brown <neilb@...>
Date: Friday, August 3, 2007 - 7:00 am

Hi,

Am Wednesday 01 August 2007 08:09 schrieb Andrew Morton:

I still get some nfs related locking bug.

I applied 

linux-2.6.23-001-fix_rpciod_down_race.dif
linux-2.6.23-003-fix_locking_regression.dif
linux-2.6.23-004-fix_stateid_regression.dif

=============================================
[ INFO: possible recursive locking detected ]
2.6.23-rc1-mm2 #3
---------------------------------------------
events/0/5 is trying to acquire lock:
 (events){--..}, at: [<c012ed90>] flush_workqueue+0x0/0x70

but task is already holding lock:
 (events){--..}, at: [<c012e5c4>] run_workqueue+0xd4/0x1e0

other info that might help us debug this:
2 locks held by events/0/5:
 #0:  (events){--..}, at: [<c012e5c4>] run_workqueue+0xd4/0x1e0
 #1:  ((nfs_automount_task).work){--..}, at: [<c012e5c4>] 
run_workqueue+0xd4/0x1e0

stack backtrace:
 [<c0104fda>] show_trace_log_lvl+0x1a/0x30
 [<c0105c02>] show_trace+0x12/0x20
 [<c0105d15>] dump_stack+0x15/0x20
 [<c013ee42>] __lock_acquire+0xc22/0x1030
 [<c013f2b1>] lock_acquire+0x61/0x80
 [<c012edd9>] flush_workqueue+0x49/0x70
 [<c012ee0d>] flush_scheduled_work+0xd/0x10
 [<dcf55c0c>] nfs_release_automount_timer+0x2c/0x30 [nfs]
 [<dcf45d8e>] nfs_free_server+0x9e/0xd0 [nfs]
 [<dcf4e626>] nfs_kill_super+0x16/0x20 [nfs]
 [<c017b38d>] deactivate_super+0x7d/0xa0
 [<c018f94b>] mntput_no_expire+0x4b/0x80
 [<c018fd94>] expire_mount_list+0xe4/0x140
 [<c0191219>] mark_mounts_for_expiry+0x99/0xb0
 [<dcf55d1d>] nfs_expire_automounts+0xd/0x40 [nfs]
 [<c012e61b>] run_workqueue+0x12b/0x1e0
 [<c012f05b>] worker_thread+0x9b/0x100
 [<c0131c72>] kthread+0x42/0x70
 [<c0104c0f>] kernel_thread_helper+0x7/0x18
 =======================

thanks

Marc

-- 
	"The enemy uses unauthorized weapons."
		 Lord Arthur Ponsonby, "Falsehood in Wartime: Propaganda Lies of the First 
World War", 1928
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Messages in current thread:
2.6.23-rc1-mm2, Andrew Morton, (Wed Aug 1, 2:09 am)
[-mm patch] make pm3fb_init() static again, Adrian Bunk, (Tue Aug 14, 5:21 pm)
2.6.23-rc1-mm2: MMC_ARMMMCI compile error, Adrian Bunk, (Wed Aug 8, 5:31 pm)
Re: 2.6.23-rc1-mm2: MMC_ARMMMCI compile error, Pierre Ossman, (Thu Aug 9, 8:03 am)
Re: 2.6.23-rc1-mm2, Marc Dietrich, (Fri Aug 3, 7:00 am)
Re: 2.6.23-rc1-mm2, Andrew Morton, (Fri Aug 3, 12:38 pm)
Re: [NFS] 2.6.23-rc1-mm2, Trond Myklebust, (Fri Aug 3, 1:03 pm)
Re: [NFS] 2.6.23-rc1-mm2, Oleg Nesterov, (Fri Aug 3, 1:21 pm)
Re: [NFS] 2.6.23-rc1-mm2, Trond Myklebust, (Tue Aug 7, 5:08 pm)
Re: [NFS] 2.6.23-rc1-mm2, Oleg Nesterov, (Tue Aug 7, 5:37 pm)
Re: [NFS] 2.6.23-rc1-mm2, Trond Myklebust, (Tue Aug 7, 6:05 pm)
Re: [NFS] 2.6.23-rc1-mm2, Oleg Nesterov, (Tue Aug 7, 6:20 pm)
Re: [NFS] 2.6.23-rc1-mm2, Trond Myklebust, (Tue Aug 7, 7:08 pm)
Re: [NFS] 2.6.23-rc1-mm2, Oleg Nesterov, (Tue Aug 7, 7:14 pm)
Re: [NFS] 2.6.23-rc1-mm2, Johannes Berg, (Mon Aug 6, 2:24 am)
Re: [NFS] 2.6.23-rc1-mm2, Marc Dietrich, (Mon Aug 6, 7:05 am)
Re: [NFS] 2.6.23-rc1-mm2, Trond Myklebust, (Mon Aug 6, 12:24 pm)
Re: [NFS] 2.6.23-rc1-mm2, Marc Dietrich, (Tue Aug 7, 8:09 am)
Re: [NFS] 2.6.23-rc1-mm2, Johannes Berg, (Mon Aug 6, 7:13 am)
Re: [NFS] 2.6.23-rc1-mm2, Oleg Nesterov, (Mon Aug 6, 6:53 am)
Re: [NFS] 2.6.23-rc1-mm2, Johannes Berg, (Mon Aug 6, 6:58 am)
Re: 2.6.23-rc1-mm2: Fix crash in sysfs_hash_and_remove, Rafael J. Wysocki, (Thu Aug 2, 1:31 pm)
Re: 2.6.23-rc1-mm2: Fix crash in sysfs_hash_and_remove, Eric W. Biederman, (Thu Aug 2, 2:19 pm)
[PATCH -mm] linux-audit list is subscribers-only , Gabriel C, (Wed Aug 1, 7:59 pm)
Re: [PATCH -mm] linux-audit list is subscribers-only, Randy Dunlap, (Wed Aug 1, 9:30 pm)
INOTIFY=n , AUDIT*=y compile error, Gabriel C, (Wed Aug 1, 7:40 pm)
Re: 2.6.23-rc1-mm2, , (Wed Aug 1, 4:30 pm)
Re: 2.6.23-rc1-mm2, Andrew Morton, (Wed Aug 1, 4:40 pm)
Re: 2.6.23-rc1-mm2, Torsten Kaiser, (Wed Aug 1, 4:52 pm)
Re: 2.6.23-rc1-mm2, Mel Gorman, (Wed Aug 1, 7:40 pm)
Re: 2.6.23-rc1-mm2, Andy Whitcroft, (Thu Aug 2, 10:01 am)
Re: 2.6.23-rc1-mm2, Torsten Kaiser, (Thu Aug 2, 1:44 pm)
Re: 2.6.23-rc1-mm2, Torsten Kaiser, (Thu Aug 2, 12:38 am)
Re: 2.6.23-rc1-mm2, Andrew Morton, (Wed Aug 1, 5:17 pm)
[PATCH -mm] Fix a section mismatch warning, Gabriel C, (Wed Aug 1, 11:19 am)
[PATCH] fix slown down printk on boot compile error, Heiko Carstens, (Wed Aug 1, 7:16 am)
Re: [PATCH] fix slown down printk on boot compile error, Randy Dunlap, (Wed Aug 1, 12:32 pm)
Re: 2.6.23-rc1-mm2, Gabriel C, (Wed Aug 1, 6:56 am)
Re: 2.6.23-rc1-mm2, Andrew Morton, (Wed Aug 1, 1:26 pm)
Re: 2.6.23-rc1-mm2, Gabriel C, (Wed Aug 1, 1:39 pm)
unionfs compile error ( Re: 2.6.23-rc1-mm2 ), Gabriel C, (Wed Aug 1, 6:33 am)
Re: unionfs compile error ( Re: 2.6.23-rc1-mm2 ), Andrew Morton, (Wed Aug 1, 1:22 pm)
Re: unionfs compile error ( Re: 2.6.23-rc1-mm2 ), Gabriel C, (Wed Aug 1, 1:35 pm)
Re: unionfs compile error ( Re: 2.6.23-rc1-mm2 ), Josef Sipek, (Wed Aug 1, 1:27 pm)
Re: unionfs compile error ( Re: 2.6.23-rc1-mm2 ) , Erez Zadok, (Thu Aug 2, 12:29 pm)
[PATCH] prevent SSB compilation on s390 part 2, Heiko Carstens, (Wed Aug 1, 5:34 am)
Re: [PATCH] prevent SSB compilation on s390 part 2, Heiko Carstens, (Wed Aug 1, 10:43 am)
Re: [PATCH] prevent SSB compilation on s390 part 2, Michael Buesch, (Wed Aug 1, 10:54 am)
Re: [PATCH] prevent SSB compilation on s390 part 2, John W. Linville, (Wed Aug 1, 8:24 am)
Re: 2.6.23-rc1-mm2, Mariusz Kozlowski, (Wed Aug 1, 4:02 am)
Re: 2.6.23-rc1-mm2, Segher Boessenkool, (Mon Aug 6, 3:08 pm)
Re: 2.6.23-rc1-mm2, Mariusz Kozlowski, (Mon Aug 6, 3:34 pm)
Re: 2.6.23-rc1-mm2, Segher Boessenkool, (Mon Aug 6, 5:25 pm)
Re: 2.6.23-rc1-mm2, Mariusz Kozlowski, (Mon Aug 6, 6:34 pm)
Re: 2.6.23-rc1-mm2, Segher Boessenkool, (Mon Aug 6, 7:12 pm)
Re: 2.6.23-rc1-mm2, Greg KH, (Wed Aug 1, 12:36 pm)
Re: 2.6.23-rc1-mm2, Paul Mackerras, (Wed Aug 1, 6:32 am)
Re: 2.6.23-rc1-mm2, Mariusz Kozlowski, (Thu Aug 2, 6:14 am)
Re: 2.6.23-rc1-mm2, Segher Boessenkool, (Mon Aug 6, 3:10 pm)
Re: 2.6.23-rc1-mm2, Kumar Gala, (Fri Aug 3, 5:39 am)
Re: 2.6.23-rc1-mm2, Segher Boessenkool, (Mon Aug 6, 3:12 pm)
Re: 2.6.23-rc1-mm2, Andrew Morton, (Wed Aug 1, 4:13 am)
Re: 2.6.23-rc1-mm2, Jiri Kosina, (Wed Aug 1, 6:23 am)
Re: 2.6.23-rc1-mm2, Mariusz Kozlowski, (Thu Aug 2, 5:47 am)
Re: [linux-usb-devel] 2.6.23-rc1-mm2, Alan Stern, (Thu Aug 2, 10:20 am)
Re: [linux-usb-devel] 2.6.23-rc1-mm2, Mariusz Kozlowski, (Thu Aug 2, 10:32 am)
Re: [linux-usb-devel] 2.6.23-rc1-mm2, Jiri Kosina, (Thu Aug 2, 10:26 am)
Re: 2.6.23-rc1-mm2, Ingo Molnar, (Wed Aug 1, 4:16 am)
Re: 2.6.23-rc1-mm2, Paul Mundt, (Wed Aug 1, 2:25 am)
Re: 2.6.23-rc1-mm2, Jason Wessel, (Wed Aug 1, 8:22 am)
Re: 2.6.23-rc1-mm2, Mike Frysinger, (Wed Aug 1, 3:58 am)
Re: 2.6.23-rc1-mm2, Paul Mundt, (Wed Aug 1, 4:15 am)
Re: 2.6.23-rc1-mm2, Mike Frysinger, (Wed Aug 1, 5:04 am)
Re: 2.6.23-rc1-mm2, Andrew Morton, (Wed Aug 1, 4:10 am)
Re: 2.6.23-rc1-mm2, Christoph Hellwig, (Wed Aug 1, 9:45 am)
Re: 2.6.23-rc1-mm2, Jason Wessel, (Wed Aug 1, 9:57 am)